Senior Mainframe Systems Programmer - z/OS

Ensono · Remote - United States

🇺🇸 Remote (US)Senior$85,000 – $148,000/yr1mo ago

At a glance

Where: Remote — open to applicants in the United States
Pay: $85,000 – $148,000/yr — as listed by Ensono
Level: Senior
Team: Software Development
Experience: 10+ years
Education: Bachelor's degree, or equivalent experience
Posted: October 8, 2026
Last confirmed open: 4m ago
At Ensono: 27 open remote roles — mostly Software Development (13), Other (8), Project Management (3). Pay is listed on 27 of them ($60,000 – $225,000/yr).
How to apply: Directly on Ensono's own site — no NodJobs account needed.

About the role

This role provides systems programming support for projects involving installation, testing and implementation of z/OS and other system software, plus maintenance, debugging, monitoring and tuning of those systems. It suits senior candidates with 10+ years of mainframe experience in large enterprises and working knowledge of z/OS components and supporting systems software; it is not an applications programming position.

What you'll do

Participate in the on-call schedule.
Resolve incidents and problems.
Handle incidents, changes and problems across z/OS and related tools.
Perform configuration and customization of z/OS environments.
Set up system parameters.
Communicate with vendors.
Participate in and contribute to technical projects.
Support problem resolution and change implementation on z/OS environments.
Monitor and tune systems software.
Maintain and debug systems software.
Install, test and implement new z/OS operating systems and other system software for ongoing projects.

What you'll need

Minimum of 10+ years of experience in a mainframe environment within a large enterprise, or equivalent combination of education and experience.
Bachelor's degree required, and/or equivalent work experience.
Knowledge and understanding of z/OS, including installation and maintenance with SMP/E.
Working knowledge of TSO/ISPF, SDSF and JCL.
Working knowledge of Unix System Services (USS), including USS file system management and security.
Solid understanding of z/OS and related product software.
PARMLIB configuration and JES2 customization.
Ability to work well as a team member.
Stress resistant during major incidents and emergency situations.
Good interpersonal, verbal and written communication skills.
Customer service skills at management level.
Good collaboration and teamwork skills.
Self-motivated.
Strong analytical and problem-solving skills.
Good planning and organizational skills.
Initiative and good learning abilities.
Ability to perform the skill set of a mainframe systems programmer.
Ability to perform moderately complex ISV installations.
Knowledgeable in z/OS security and z/OS systems programming functions.
Understanding of z/OS services structure, Parallel Sysplex and catalog management.

Benefits listed by Ensono

Unlimited paid days off
Three health plan options
401(k) with company match
Dental, vision, short and long-term disability, life and AD&D coverage, and flexible spending accounts
Family forming benefit including fertility coverage and adoption/surrogacy reimbursement
Paid childbearing and paternal leave
Education reimbursement, student loan assistance or 529 college funding
Sabbatical leave
Wellness program
Flexible work schedule